DE202015006341U1 - pump cassette - Google Patents
pump cassette Download PDFInfo
- Publication number
- DE202015006341U1 DE202015006341U1 DE202015006341.1U DE202015006341U DE202015006341U1 DE 202015006341 U1 DE202015006341 U1 DE 202015006341U1 DE 202015006341 U DE202015006341 U DE 202015006341U DE 202015006341 U1 DE202015006341 U1 DE 202015006341U1
- Authority
- DE
- Germany
- Prior art keywords
- chambers
- valves
- sterility
- cassette
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
- F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/71—Suction drainage systems
- A61M1/72—Cassettes forming partially or totally the fluid circuit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/80—Suction pumps
- A61M1/82—Membrane pumps, e.g. bulbs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
- A61M2205/128—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit with incorporated valves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/06—Head
- A61M2210/0612—Eyes
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Vascular Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- External Artificial Organs (AREA)
Abstract
Kunststoffkassette (A) bestehend aus zwei Pumpkammern (F) pro Pumpgruppe, jeweils durch eine flexible undurchlässige Membran (G) unterteilt, vier Ventilen (B), (C), (D), (E) pro Pumpgruppe und Verbindungsleitungen, dadurch gekennzeichnet, dass mit einem pneumatisch geregeltem Antrieb (M), (I), (J) sterile Fluide mit nahezu zeitlich konstantem Volumenstrom abgesaugt oder gefördert werden können, wobei stets die Sterilität bewahrt wird.Plastic cassette (A) consisting of two pumping chambers (F) per pumping group, each divided by a flexible impermeable membrane (G), four valves (B), (C), (D), (E) per pumping group and connecting lines, characterized that with a pneumatically controlled drive (M), (I), (J) sterile fluids can be sucked off or conveyed with an almost constant volume flow, whereby always the sterility is preserved.
Description
Fluidpumpen zur Absaugung oder Förderung von biologischen Fluiden, z. B. Körperfluiden oder Körperersatzfluiden, insbesondere bei der Anwendung der Augenchirurgie, werden meist als Peristaltik- oder Venturipumpen ausgeführt. Während Peristaltikpumpen die Sterilität des zu pumpenden Mediums gewährleisten, entstehen beim Pumpen unerwünschte Pulsationen. Bei Venturipumpen sind die Pulsationen nicht vorhanden, können aber die Sterilität nicht gänzlich gewährleisten. Ähnliches gilt bei Kombinationen dieser beiden Pumparten oder bei üblichen Membranpumpen, bei denen die Pumpeinheit nicht als steriles Element ausgeführt ist. Zur Problemlösung wird die im Folgenden beschriebene Membranpumpe verwendet. Dabei ist die Pumpeinheit steril und auswechselbar in der Art einer Kassette (A) ausgeführt. Mit der Verwendung von zwei Membranen (G) pro Pumpengruppe können neben der Gewährleistung der Sterilität auch pulsationsfreie oder zumindest pulsationsarme Pumpvorgänge durch zeitgesteuerte oder druckgeregelte Ventilschaltungen erzielt werden. Die Entkopplung des zu pumpenden Fluides wird durch die druckdichte Trennmembran (G) und dem pneumatischen Antrieb (M), (I), (J) erreicht. Die Pumpengruppe wird in einer Kassette (A) mit Ventilen (B), (C), (D), (E) und Verbindungsleitung zusammengefasst und kann z. B. im Spritzgussverfahren kostengünstig und in hoher Stückzahl gefertigt werden. Es handelt sich um eine in einer Kunststoffkassette (A) integrierte Pumpengruppe, die sowohl saugen, als auch fördern kann. Die Pumpeneinheit besteht aus zwei Kammern (F), (H) mit jeweils einer flexiblen Membran (G), die die Kammern unterteilen. Es existieren jeweils eine Luftkammer (H) und eine Fluidkammer (F). Die Luftkammern (H) dienen dem Antrieb der Pumpe und werden mittels der Druckregler I(I) & II(J) mit der zeitlich veränderbaren Drücke pI(t)(N) und pII(t)(O) beaufschlagt. Sowohl Unterdruck, als auch Überdruck – bezogen auf Atmosphärendruck – ist separat regelbar, sodass sich die Membranen (G) beidseitig und unabhängig auslenken können. Die Druckregler (I), (J) werden mittels einer Druckluftversorgungs- und Luftaufbereitungseinheit (M) gespeist. Durch die sich auslenkenden fluiddichten Membranen (G) werden die Volumina der Fluidkammern (F) zeitlich verändert und in Folge deren Drücke. Mit der angepassten wechselseitigen Schaltung der Ventile (B), (C), (D), (E) wird dadurch ein Volumenstrom erzeugt. Die Größe des Volumenstromes hängt von der Druckbeaufschlagung der Luftkammern (H) ab. Die beiden Auslassventile (I-1(B) & II-1(D)), als auch beide Einlassventile (I-2(C) & II-2(E)) werden in einer zeitlichen Abfolge sinnvoll geschaltet, sodass während die eine Fluidkammer (F) saugt bzw. fördert, fördert bzw. saugt die andere Kammer. Das Saugen bzw. Fördern geschieht somit immer wechselseitig. Die Drücke der Fluidkammern (F) werden unmittelbar vor dem Umschalten der Ventile (B), (C), (D), (E) gleichwertig eingestellt, sodass sich keine oder nur geringe Druckschwankungen in den Fluidkammern (F) ergeben. Ziel ist die Erreichung eines zeitlich konstanten Volumenstromes.Fluid pumps for the extraction or delivery of biological fluids, eg. As body fluids or body replacement fluids, especially in the application of ophthalmic surgery, are usually designed as peristaltic or Venturi pumps. While peristaltic pumps ensure the sterility of the medium to be pumped, unwanted pulsations occur during pumping. In venturi pumps, the pulsations are absent but can not fully guarantee sterility. The same applies to combinations of these two pumps or conventional diaphragm pumps, in which the pump unit is not designed as a sterile element. To solve the problem, the diaphragm pump described below is used. The pump unit is sterile and interchangeable in the manner of a cassette (A) executed. With the use of two membranes (G) per pump group, pulsation-free or at least low-pulsation pumping processes can be achieved by time-controlled or pressure-controlled valve circuits in addition to ensuring sterility. The decoupling of the fluid to be pumped is achieved by the pressure-tight separation membrane (G) and the pneumatic drive (M), (I), (J). The pump group is combined in a cassette (A) with valves (B), (C), (D), (E) and connecting line and can, for. B. are manufactured inexpensively and in large quantities by injection molding. It is a pump unit integrated into a plastic cassette (A) that can both suck and convey. The pump unit consists of two chambers (F), (H) each with a flexible membrane (G), which divide the chambers. There are each an air chamber (H) and a fluid chamber (F). The air chambers (H) are used to drive the pump and by means of the pressure regulator I (I) & II (J) with the time-varying pressures p I (t) (N) and p II (t) (O) acted upon. Both negative pressure and overpressure - based on atmospheric pressure - can be regulated separately, so that the membranes (G) can deflect on both sides independently. The pressure regulators (I), (J) are fed by means of a compressed air supply and air treatment unit (M). Due to the deflecting fluid-tight membranes (G), the volumes of the fluid chambers (F) are changed over time and as a result of their pressures. With the adapted mutual switching of the valves (B), (C), (D), (E) thereby a volume flow is generated. The size of the volume flow depends on the pressurization of the air chambers (H). The two exhaust valves (I-1 (B) & II-1 (D)), as well as both intake valves (I-2 (C) & II-2 (E)) are made meaningful in a timed sequence so that while one Fluid chamber (F) sucks or promotes, promotes or sucks the other chamber. The sucking or conveying thus always happens mutually. The pressures of the fluid chambers (F) are set equal to each other immediately before the switching of the valves (B), (C), (D), (E), so that no or only small pressure fluctuations in the fluid chambers (F) result. The aim is to achieve a constant flow over time.
Das System oder die Konsole, in die die Kunststoffkassette integriert ist, weißt optional eine Messvorrichtung zur Erfassung des zeitlich veränderlichen Volumens der beiden Fluidkammern (F) oder der Luftkammern (H) auf, z. B. kann die Bewegung der Membran (G) über eine Wegmessung erfasst werden. Somit kann der zeitlich veränderliche Volumenstrom gemessen werden. Die Pumpengruppe, bestehend aus Pumpkammern (F), (H), Membranen (G), Ventilen (B), (C), (D), (E) und Verbindungsleitungen, sind in einer Kunststoffkassette (A) integriert und kann z. B. im Spritzgussverfahren hergestellt werden. Durch diese Anordnung ist eine Medientrennung (Bewahrung der Sterilität) erreicht. Die Kassette (A) ist wasch- und sterilisierbar und kann als Pumpengruppe u. a. zum Absaugen oder Fördern von biologischen Fluiden, z. B. Körperfluiden oder Körperersatzfluiden, verwendet werden. The system or console, in which the plastic cassette is integrated, optionally has a measuring device for detecting the time-varying volume of the two fluid chambers (F) or the air chambers (H), z. B., the movement of the membrane (G) can be detected by a displacement measurement. Thus, the time-varying volume flow can be measured. The pump group, consisting of pumping chambers (F), (H), membranes (G), valves (B), (C), (D), (E) and connecting lines are integrated in a plastic cassette (A) and z. B. are produced by injection molding. By this arrangement, a media separation (preservation of sterility) is achieved. The cassette (A) is washable and sterilizable and can be used as a pump group u. a. for aspirating or conveying biological fluids, eg. As body fluids or body replacement fluids are used.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
-
- (A):(A):
- Kassettecassette
- (B):(B):
- Ventil I-1Valve I-1
- (C):(C):
- Ventil I-2Valve I-2
- (D):(D):
- Ventil II-1Valve II-1
- (E):(E):
- Ventil II-2Valve II-2
- (F):(F):
- Fluidkammerfluid chamber
- (G):(G):
- Flexible MembranFlexible membrane
- (H):(H):
- Luftkammerair chamber
- (I):(I):
- Druckregler IPressure regulator I
- (J):(J):
- Druckregler IIPressure regulator II
- (K):(K):
- Anschluss INConnection IN
- (L):(L):
- Anschluss OUTConnection OUT
- (M):(M):
- Druckluftversorgungs- und LuftaufbereitungseinheitCompressed air supply and air treatment unit
- (N):(N):
- pI(t)p I (t)
- (O):(O):
- pII(t)p II (t)
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202015006341.1U DE202015006341U1 (en) | 2015-09-08 | 2015-09-08 | pump cassette |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202015006341.1U DE202015006341U1 (en) | 2015-09-08 | 2015-09-08 | pump cassette |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202015006341U1 true DE202015006341U1 (en) | 2015-11-06 |
Family
ID=54707155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202015006341.1U Expired - Lifetime DE202015006341U1 (en) | 2015-09-08 | 2015-09-08 | pump cassette |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE202015006341U1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018054834A1 (en) * | 2016-09-20 | 2018-03-29 | Medela Holding Ag | Device for suctioning bodily fluids and for supplying a substance |
EP3318226B1 (en) | 2016-11-03 | 2021-01-06 | This AG | Clean venturi aspiration |
US11090417B2 (en) | 2016-09-20 | 2021-08-17 | Medela Holding Ag | Suctioning and supply device with drive unit and connecting part |
-
2015
- 2015-09-08 DE DE202015006341.1U patent/DE202015006341U1/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018054834A1 (en) * | 2016-09-20 | 2018-03-29 | Medela Holding Ag | Device for suctioning bodily fluids and for supplying a substance |
CN109789251A (en) * | 2016-09-20 | 2019-05-21 | 美德乐控股公司 | Device for aspirating body fluid and for conveying substance |
EP3603689A1 (en) | 2016-09-20 | 2020-02-05 | Medela Holding AG | Device for siphoning bodily fluids and for delivering a substance |
US11090417B2 (en) | 2016-09-20 | 2021-08-17 | Medela Holding Ag | Suctioning and supply device with drive unit and connecting part |
CN109789251B (en) * | 2016-09-20 | 2021-12-28 | 美德乐控股公司 | Device for aspirating body fluids and for delivering substances |
US11644026B2 (en) | 2016-09-20 | 2023-05-09 | Medela Holding Ag | Device for suctioning bodily fluids and for supplying a substance |
EP3318226B1 (en) | 2016-11-03 | 2021-01-06 | This AG | Clean venturi aspiration |
US11786398B2 (en) | 2016-11-03 | 2023-10-17 | This Ag | Sterile Venturi aspiration |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R086 | Non-binding declaration of licensing interest | ||
R207 | Utility model specification | ||
R156 | Lapse of ip right after 3 years |